An 18-year-old Jersey City man has been charged with striking a 15-year-old boy in the face with brass knuckles, fracturing his jaw, and beating his legs with a lead pipe, officials said.

Justin Matos, of the 400 block of Mercer Street, made his first court appearance this afternoon on the charges of aggravated assault, possession of brass knuckles and possession of the brass knuckles for an unlawful purpose, the criminal complaint says.

On Wednesday at about 7:40 p.m. officers responded to the victim’s home and spoke to his mother, who said her son was assaulted by a group of males on Palisade Avenue near Dickinson High School while leaving a school athletic event, a report says.

The boy said he was assaulted by a group of males that had been harassing him for the past two weeks and the mother said she had already filed complaints against the juveniles in the group, the complaint says.

But the mother was “was adamant about reporting the adult actor of the group, Justin Matos, who struck the victim (name omitted) on the right side of the face with a pair of brass knuckles and with a lead pipe to his legs,” the complaint says.

The 15-year-old suffered swelling to the right side of his face and was taken to Christ Hospital for treatment, the report says. The complaint says his jaw was fractured.

Matos made his first appearance on the charges today in Central Judicial Processing court in Jersey City via video link from Hudson County jail in Kearny. His bail was set at $10,000 with a 10 percent cash option. A court official said Matos is believed to be a high school student.